Polyester compositions of low residual aldehyde content

Details Polyester compositions of low residual aldehyde content Polyester compositions of low residual aldehyde content

C - Chemistry, Metallurgy

08

L

C08L 67/02 (2006.01) C08L 33/26 (2006.01) C08L 33/24 (2006.01)

Patent

CA 2384356

A mixture of a polyester, such as poly(ethylene terephthalate) PET, and a second polymer which is polyacrylamide, polymethacrylamide or copolymer of acrylamide or methacrylamide when extrusion compounded exhibits a lower residual acetaldehyde content than does PET alone when similarly treated. The invention pertains to any polyester used in the manufacture of bottles or containers which in turn are used to store consumer materials, especially food, beverages and most especially water.

Mélange d'un polyester, tel que polyéthylène térephtalate (PET), et d'un deuxième polymère, tel que polyacrylamide, polyméthacrylamide ou copolymère d'acrylamide ou de méthacrylamide, présentant, quand on les combine par extrusion, une teneur en acétaldéhyde résiduel plus basse que celle de PET seul quand on le traite de façon semblable. L'invention concerne également tout polyester utilisé dans la fabrication de bouteilles ou de réservoirs qu'on utilise ensuite pour contenir des matériaux de consommation, en particulier, des produits alimentaires, des boissons et, plus particulièrement, de l'eau.

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